//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.util.ssl;

import org.eclipse.jetty.util.component.Dumpable;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

class SslSelectionDump implements Dumpable {
    final String type;
    final SslSelectionDump.CaptionedList enabled = new SslSelectionDump.CaptionedList("Enabled");
    final SslSelectionDump.CaptionedList disabled = new SslSelectionDump.CaptionedList("Disabled");
    public SslSelectionDump(String type,
                            String[] supportedByJVM,
                            String[] enabledByJVM,
                            String[] excludedByConfig,
                            String[] includedByConfig) {
        this.type = type;

        List<String> jvmEnabled = Arrays.asList(enabledByJVM);
        List<Pattern> excludedPatterns = Arrays.stream(excludedByConfig)
                .map((entry) -> Pattern.compile(entry))
                .collect(Collectors.toList());
        List<Pattern> includedPatterns = Arrays.stream(includedByConfig)
                .map((entry) -> Pattern.compile(entry))
                .collect(Collectors.toList());

        Arrays.stream(supportedByJVM)
                .sorted(Comparator.naturalOrder())
                .forEach((entry) ->
                {
                    boolean isPresent = true;

                    StringBuilder s = new StringBuilder();
                    s.append(entry);

                    for (Pattern pattern : excludedPatterns) {
                        Matcher m = pattern.matcher(entry);
                        if (m.matches()) {
                            if (isPresent) {
                                s.append(" -");
                                isPresent = false;
                            } else {
                                s.append(",");
                            }
                            s.append(" ConfigExcluded:'").append(pattern.pattern()).append('\'');
                        }
                    }

                    boolean isIncluded = false;

                    if (!includedPatterns.isEmpty()) {
                        for (Pattern pattern : includedPatterns) {
                            Matcher m = pattern.matcher(entry);
                            if (m.matches()) {
                                isIncluded = true;
                                break;
                            }
                        }

                        if (!isIncluded) {
                            if (isPresent) {
                                s.append(" -");
                                isPresent = false;
                            } else {
                                s.append(",");
                            }

                            s.append(" ConfigIncluded:NotSelected");
                        }
                    }

                    if (!isIncluded && !jvmEnabled.contains(entry)) {
                        if (isPresent) {
                            s.append(" -");
                            isPresent = false;
                        }

                        s.append(" JVM:disabled");
                    }

                    if (isPresent) {
                        enabled.add(s.toString());
                    } else {
                        disabled.add(s.toString());
                    }
                });
    }

    @Override
    public String dump() {
        return Dumpable.dump(this);
    }

    @Override
    public void dump(Appendable out, String indent) throws IOException {
        Dumpable.dumpObjects(out, indent, this, enabled, disabled);
    }

    @Override
    public String toString() {
        return String.format("%s Selections", type);
    }

    static class CaptionedList extends ArrayList<String> implements Dumpable {
        private final String caption;

        public CaptionedList(String caption) {
            this.caption = caption;
        }

        @Override
        public String dump() {
            return Dumpable.dump(SslSelectionDump.CaptionedList.this);
        }

        @Override
        public void dump(Appendable out, String indent) throws IOException {
            Object[] array = toArray();
            Dumpable.dumpObjects(out, indent, caption + " size=" + array.length, array);
        }
    }
}
